/* n8n-style ops workflow demo */
:root {
  --n-bg: #f4f6f8;
  --n-surface: #ffffff;
  --n-ink: #0f172a;
  --n-soft: #334155;
  --n-muted: #64748b;
  --n-line: #e2e8f0;
  --n-primary: #ea4b71;
  --n-primary-dark: #c73a5c;
  --n-primary-soft: #fce7ee;
  --n-blue: #0369a1;
  --n-blue-soft: #e0f2fe;
  --n-ok: #15803d;
  --n-ok-soft: #dcfce7;
  --n-warn: #b45309;
  --n-warn-soft: #fffbeb;
  --n-err: #b91c1c;
  --n-err-soft: #fee2e2;
  --n-radius: 12px;
  --n-shadow: 0 1px 2px rgba(15,23,42,0.05), 0 10px 28px rgba(15,23,42,0.07);
  --n-font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
body.n8n-demo {
  margin: 0;
  font-family: var(--n-font);
  color: var(--n-ink);
  background: var(--n-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; }
a { color: var(--n-blue); }

.n-top {
  background: var(--n-surface);
  border-bottom: 1px solid var(--n-line);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.n-brand {
  font-weight: 800;
  text-decoration: none;
  color: var(--n-ink);
  line-height: 1.15;
}
.n-brand span {
  display: block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--n-muted);
}
.n-back {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--n-muted);
  text-decoration: none;
}
.n-back:hover { color: var(--n-primary); }

.n-wrap {
  width: min(100% - 1.5rem, 960px);
  margin: 1rem auto 1.5rem;
}
.n-hero {
  background: var(--n-surface);
  border: 1px solid var(--n-line);
  border-radius: var(--n-radius);
  padding: 1.15rem 1.2rem;
  box-shadow: var(--n-shadow);
  margin-bottom: 1rem;
}
.n-hero h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.25rem, 3.5vw, 1.65rem);
}
.n-hero p {
  margin: 0;
  color: var(--n-soft);
  max-width: 40rem;
}
.n-pill {
  display: inline-flex;
  margin-top: 0.7rem;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--n-primary-soft);
  color: var(--n-primary-dark);
  font-size: 0.75rem;
  font-weight: 700;
}

.sample-card {
  background: var(--n-blue-soft);
  border: 1px solid #bae6fd;
  border-radius: var(--n-radius);
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.92rem;
}
.sample-card strong { color: var(--n-ink); }
.sample-grid {
  display: grid;
  gap: 0.35rem 1rem;
  margin-top: 0.5rem;
}
@media (min-width: 560px) {
  .sample-grid { grid-template-columns: 1fr 1fr; }
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
  align-items: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 42px;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  border: 2px solid transparent;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
}
.btn-primary {
  background: var(--n-primary);
  color: #fff;
}
.btn-primary:hover { background: var(--n-primary-dark); }
.btn-secondary {
  background: #fff;
  border-color: var(--n-line);
  color: var(--n-ink);
}
.btn-secondary:hover { border-color: var(--n-primary); color: var(--n-primary); }
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.step-label {
  font-size: 0.88rem;
  color: var(--n-muted);
  font-weight: 600;
}

.flow-board {
  background: var(--n-surface);
  border: 1px solid var(--n-line);
  border-radius: var(--n-radius);
  padding: 1rem 0.75rem;
  box-shadow: var(--n-shadow);
  overflow-x: auto;
  margin-bottom: 1rem;
}
.flow-track {
  display: flex;
  align-items: stretch;
  gap: 0.35rem;
  min-width: 720px;
  padding-bottom: 0.25rem;
}
.flow-node {
  flex: 1 1 0;
  min-width: 5.5rem;
  background: #f8fafc;
  border: 2px solid var(--n-line);
  border-radius: 12px;
  padding: 0.7rem 0.5rem;
  text-align: center;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}
.flow-node .icon {
  width: 28px;
  height: 28px;
  margin: 0 auto 0.4rem;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 800;
  background: var(--n-line);
  color: var(--n-soft);
}
.flow-node .title {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--n-ink);
  line-height: 1.25;
}
.flow-node .sub {
  margin-top: 0.2rem;
  font-size: 0.68rem;
  color: var(--n-muted);
  font-weight: 600;
}
.flow-arrow {
  flex: 0 0 auto;
  align-self: center;
  color: var(--n-muted);
  font-weight: 800;
  font-size: 1rem;
}
.flow-node.active {
  border-color: var(--n-primary);
  background: var(--n-primary-soft);
  box-shadow: 0 0 0 3px rgba(234, 75, 113, 0.15);
}
.flow-node.done {
  border-color: #86efac;
  background: var(--n-ok-soft);
}
.flow-node.done .icon { background: #86efac; color: var(--n-ok); }
.flow-node.active .icon { background: var(--n-primary); color: #fff; }
.flow-node.error-node.active {
  border-color: var(--n-err);
  background: var(--n-err-soft);
  box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.12);
}
.flow-node.error-node.active .icon { background: var(--n-err); color: #fff; }

.branch-note {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--n-muted);
  text-align: center;
}

.payload-panel {
  background: var(--n-surface);
  border: 1px solid var(--n-line);
  border-radius: var(--n-radius);
  padding: 1rem 1.1rem;
  box-shadow: var(--n-shadow);
}
.payload-panel h2 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
}
.payload-panel .hint {
  margin: 0 0 0.75rem;
  font-size: 0.88rem;
  color: var(--n-muted);
}
.payload-box {
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 10px;
  padding: 0.85rem 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  white-space: pre-wrap;
  line-height: 1.45;
  overflow-x: auto;
}
.payload-box.err {
  background: #450a0a;
  color: #fecaca;
}
.notify {
  display: none;
  margin-top: 0.85rem;
  padding: 0.75rem 0.9rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
}
.notify.show { display: block; }
.notify.ok { background: var(--n-ok-soft); color: var(--n-ok); }
.notify.warn { background: var(--n-warn-soft); color: var(--n-warn); }
.notify.err { background: var(--n-err-soft); color: var(--n-err); }

.n-footer {
  width: min(100% - 1.5rem, 960px);
  margin: 0 auto 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--n-muted);
  padding-top: 0.75rem;
  border-top: 1px solid var(--n-line);
}

.sim-tag {
  display: inline-block;
  margin-left: 0.25rem;
  font-size: 0.65rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--n-blue);
  background: var(--n-blue-soft);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  vertical-align: middle;
}